Nut-lock



. Patented July [9, [898.- W. B. METCALF, In.

l v a a wflw 1 2 2 1 H i Z r w -W ,.f .1 ii, %/1 E No. 607,622. PatentdJuly l9, I898.

w. B. METCALF, In.

NUT LOCK.

- (Application filed Jan. 28, 1898.)

2 S haets-Sheet 2.

(No Model.)

. v 8 0 ml a 1 IV! r a Mr v a 1 T NITED STATES] A'rnNr Fries.

NUT-LOCK.

SPECIFICATION forming part of Letter Patent No. 607,622, dated July 19,189 8. Application filed January 28, i898. Serial No} 668,306. (Nomodel.)

J12, a citizen of the United States, residing at Auburn, in the countyof Nemaha and State of Nebraska, have inventeda new and useful Nut-Lock,of which the following is a specification.

The invention relates to improvements in nut-locks.

The object of the present invention is to improve the construction ofnut-locks and to provide a simple and comparatively inexpensive onewhich will positively look a nut on a bolt, spindle, or other threadedpart and effectually prevent the same from accidentally unscrewing.

Another object of the invention is to enable a nut to be readily removedwhen desired without injuring the lockin g device, the nut, or the boltor spindle.

The invention consists in the construction and novel combination andarrangement of parts, as hereinafter fully described,'illustrated in theaccompanying drawings, and pointed out in theclaims hereto appended.

.In the drawings,Figure 1 is a'sectional view taken transversely of anut provided with a locking device constructed in accordance with thisinvention, the locking bar or dog being in engagement with a bolt orspindle. Fig. 2 is a similar View showing the parts unlocked. Fig. 3 isa detail view of the slide; Fig. 4 is a detail View of the wrench. Fig.5 is a sec tional view illustrating a modification of the invention, thelocking bar or'dog being in engagement with the bolt or spindle. Fig. 6is a similar view showing the locking bar or dog out of engagement. Fig.7 is a detail perspective view of the inner projection or arm of thewrench.

Like numerals of referencedesignate corresponding parts'in the severalfigures of the drawings. 7

- 1 designates a nut provided with asubstantially radial opening 2,communicating with the threaded opening 3 and receiving alongitudinally-movable locking-bar 4, which is adapted to engage a boltor spindle 5 or other threaded part and prevent the nut fromaccidentally unscrewing. The locking bar or dog 4 is provided at itsengaging end with ing bar or dog. 7 17 forms a lock and prevents anymovement teeth 6, which may be arranged in either a curved or straightseries and which may be of any desired size and number to hold thespindle securely, and the engaging end may be curved, as illustrated inFigs. 1 and 2 of the accompanying drawings, or it may be hook-shaped, asshown at 7 in Figs. 5 and 6, and be provided with two sets of teeth 8and 9." The locking-bar may engage the bolt or spindle in any othersuitable manner, such as providing the bolt or spindle with a groove orrecess.

The outer end of the locking bar or dog is provided with a circularopening 10, receiving an eccentric 11, which is circular to conform tothe configuration of the opening; but, as illustrated in Figs. 5 and 6,the eccentric may be triangular or of any other desired shape whichwill, when rotated, effect a reciprocation of the locking bar or dog tothrow it into engagement with the bolt or spindle and withdraw ittherefrom. The cam or eccentric is provided with a rigid arm 12, whichconnects it with a slide 13, and the latter is mounted on the lockingbar or dog between the ends thereof and is provided at its inner endwith a lug 14, fitting in a guide-slot 15 of the nut. Instead ofconstructing the arm 12 as shown in the accompanying drawings any otherform of arm or connection may be employed for enabling the slide toactuate the eccentric. The slide is provided with suitable ways 16 toreceive thelocking bar or dog; but the latter may be constructed toreceive the slide, if desired, and the ways 16 are pref.

erably formed bytongues formed on one of the parts and extending inwardover the other. The outer portion of the 'slide is provided with anangularly-disposed slot 17, having a longitudinal extension 18 andreceiving a pin 19 of the arm or link 12, whereby when the slide isreciprocated the cam will be rotated and effect a corresponding movementin the lock- The extension 18 of the slot of the locking bar or doguntil the slide is reciprocated. The engaging endof the'locking bar ordog has one arm 20 of a spring 21 bearing against it, and the other armof the spring, which is substantially L-shaped,bears against aprojection 22 of the outer end of the slide and is adapted to return thelatter to its innermost position, as shown in Fig. 1 of the accompanyingdrawings, after the parts have been unlocked and the wrench removed. Thelug 14, which may or may not extend into the guide-slot 15, is adaptedto be engaged by a tapering arm or projection 23 of a wrench or tool 24,and when the device is in its engaging position the said lug 14. islocated at the angle of the slot 15, which is substantially L-shaped,whereby the spring 21,yieldingly engaging the locking bar or dog, willcause the same to bear yieldingly against the bolt or spindle, the lugbeing adapted to play back and forth in the transverse portion of theslot 15. The slot may be varied in shape and the locking bar or dog maybe provided with teeth that will prevent the nut from rotating in eitherdirection when it is in engagement with a bolt or spindle. The nut isprovided at one side with a socket, which is adapted to be engaged by asubstantially L-shaped arm 26 at one end of the wrench 24, and thetaperin g projection or arm 23, which is substantially L-shaped incross-section, is composed of two sides or wings provided with beveledor inclined edges and adapted to be introduced into the L-shaped slot 15to reciprocate the slide sufflciently to disengage the locking bar ordog from the bolt or spindle.

The flange or wing 2 extends laterally from the wrench at right anglesto the other flange or wing of the projection or arm, and when thewrench is in engagement with the nut the latter may be unscrewed, thewrench operating as a handle or lever. When the wing 23 is employed, thelug 14 does not engage the L-shaped slot, so that the slide may movelongitudinally of the locking bar or dog while the latter swings awayfrom the spindle or bolt, the wing 23 being adapted to swingthelockingbar or dog away from the bolt or spindle and the other wing beingadapted to reciprocate the slide. The flanges or wings may beproportioned and arranged to effect a reciprocation of the slide beforethe dog is swung away from the spindle, in order to withdraw the dogbefore such swinging movement takes place, and thereby prevent thespindle and the locking bar or dog from being injured. In order toprovide an exceedingly inexpensive nut-lock, the locking dog or bar maybe employed without the eccentric or cam and the slide, and in thisconstruction the wrench will be provided between its ends with only onewing, arranged similar to the wing 23, and, if desired, more than onelocking bar or dog may be mounted on a nut, so that the latter may beheld against rotation in either direction, and any suitable form ofspring may be employed.

The invention has the following advantages: The nut-lock is positive andreliable in operation and effectually prevents a nut from accidentallyunscrewing. It will permit a nut to be rotated forward to tighten it,and a nut may be readily removed by the wrench without injuring any ofthe parts of the device or the threads of the bolt or spindle.

Changes in the form, proportion, and minor details of construction maybe resorted to without departing from the spirit or sacrificing any ofthe advantages of this invention, such as mounting the locking deviceson a bolt or screw instead of upon a nut, as shown.

WVhat I claim is- 1. In a device of the class described, the combinationof a reciprocating locking-bar designed to be mounted on a nut, bolt orspindle and adapted to prevent a nut from unscrewing accidentally,apivotally-moun ted cam or eccentric engaging the locking-bar and adaptedto reciprocate the same, and mechanism carried by the locking-bar foroscillating the cam or eccentric, substantially as described.

2. In a device of the class described, the combination of areciprocating locking-bar designed to be mounted on a nut, bolt orspindle and adapted to prevent a nut from unscrewing accidentally, aslide mounted on the locking-bar, and a cam or eccentric connected withthe slide and engaging the locking-bar, substantially as described.

3. In a device of the class described, the combination of areciprocating locking-bar designed to be mounted on a nut, belt orspindle, a pivotally-mounted cam or eccentric engaging the locking-barand adapted to reciprocate the same, and a slide mounted on thelocking-bar and connected with the cam or eccentric, substantially asdescribed.

4. In a device of the class described, the combination of a locking-bar,a pivoted cam or eccentric engaging the locking-bar and adapted toreciprocate the same, a slide mounted on the locking-bar and providedwith an angularly-disposed slot or shoulder, and an arm extending fromthe cam or eccentrio and engaging the slot or shoulder, substantially asdescribed.

5. In a device of the class described, the combination of areciprocating locking-bar, a pivoted cam or eccentric engaging thelocking-bar and adapted to reciprocate the same, a slide mounted on thelocking-bar and con nected with the cam or eccentric, and a springhaving one arm bearing against the lockingbar and another arm engagingthe slide, substantially as described.

6. In a device of the class described, the combination of areciprocating locking-bar provided with an opening, a pivoted cam oreccentric arranged in the opening, a slide mounted on the locking-barand provided with an angularly-disposed slot, an arm rigid with the camor eccentric and engaging the said slot, and a spring, substantiallyasdescribed. i

7. In a device of the class described, the combination of a nut, areciprocating lockingbar mounted thereon and having a hookshapedengaging end provided with teeth and adapted to engage a bolt or spindleat differ- IO ing-bar and provided with an L-shaped slot adapted for thereception of a projection of a tool, substantially as and for thepurpose described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in I 5 the presence of two Witnesses.

WILLIAM B. METCALF, JR. Witnesses:

CABLE NELSON, OLIVER M. DEAKIN.

